Double-acting deep-well pump.



J. G; DORWARD. I Y DOUBLE ACTING DEEP WELL PUMP.

APPLICATION FILED JULY 26, 1909.

Patented May 24, 1910.

lNvENToR Joan 6. UoRwARa,

HIS ATTQRNEY,

ANDREW B. GRAHAM om PNoYD-LHHOGRAPRERS. wAsmNGToN. D. C.

UNTTED sTATEs PATENT onirica JOI-IN G. DORWARD, OF SAN FRANCISCO, CALIFORNIA.

DOUBLE-ACTING DEEP-WELL PUMP.

To all whom it 'may concern:

Be it kno-wn that I, JOHN G. DoRwARD, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Double-Acting Deep-VVell Pumps, of which the following is a specification.

My invention relates to a double-acting pump, which is especially desirable for pumping in deep wells, and particularly those having tubular casings of limited area.

It consists of a pair of pump heads connected together by concentric tubing, t-he inner one of which forms a pump cylinder within which a plunger is movable, and the outer one forms a channel for the passage of the water;

The pump heads are formed with divisional diaphragms having a plurality of passages surrounding the central core, half of these ports or passages being utilized for suction during one stroke, and the other half to pass the water from the pump cylinder to the discharge pipe and to the surface.

My invention also comprises details of construction and combination of parts which will be more fully explained by refer-ence to the accompanying drawings, in which*- Figure l is a vertical section. Fig. 2 is a transverse section taken on the line -v Fig. l. Fig. 3 is a similar section on line y-g/ Fig. l. Fig. 4 is a section on line .e--e of Fig'. l. Fig. 5 is a section on line @-1) Fig. l.

In the usual construction of double-acting pumps, it is common to employ either a hollow piston rod, or separate exterior dis charge pipes.

In the rst construction it is difficult to provide a piston rod of suiiicient area to properly carry the water without too much friction; and in the latter construction the exterior discharge pipes occupy too much space in the `limited area usually found in deep well casings.

It is the object of my invention to provide a pump which may be readily inserted into and removed from the well casing; said pump having an ample pumping cylinder, and a conducting passage of sufficient area to dispose of the water, and to deliver it to the upwardly extending discharge pipe.

My pump consists of two heads a-b of Specification of Letters Patent.

Application filed July 26, 1909.

Patented May 24, 1910. Serial No. 509,483.

a diameter such as will allow them to be introduced into the well casing C. These heads are connected by an exterior cylinder 34, and an interior cylinder 33 which is concentric with the exterior cylinder. These cylinders may be screw-threaded at the ends and t into corresponding screw-threaded portions of the pumping-heads.

The plunger 17 is here shown consisting ofl four brass spiders, and four cup-leathers which are held in place by nuts on the lunger-rod 49. The cup-leathers are so aced that two of them operate on the up stroke, and two on the down stroke of the pump. The plunger-rod extends through the center of the two pump-heads, and upward within the discharge pipe 37 to any desired point of discharge. The whole of the pump may be submerged in the water so that water may be alternately admitted from above and below during the pumping action.

In Fig. 2 I have shown the upper part of the upper pump-head a, as having three ports, here marked A, C and E. These ports A, C and E are designed to admit water into the upper part of the upper head on the down stroke of the plunger 17. This water passes down, as shown by the arrows, until it reaches the diaphragm 2, shown in cross section in Fig. 3. At this point the water is deliected inwardly, i and into a chamber 4L inside of the pump-head c. The diaphragm or partition 5 forms the upper portion of this chamber, and the spider 7 the lower portion. The diaphragm has a tapering periphery, and fit in the corresponding taper of the inside of the pumphead as shown. The other diaphragms, to be hereafter described, are formed in the same manner, both for the upper and the lower head, and each of them is fitted with the same taper so that when it is necessary to withdraw the interior portion of the pump for any reason, it may readily be done bv pulling up on the plunger-rod.

The nut 50 at the bottom of the plungerrod 49 contacts with the lowermost valveseat 24 and the nut 47 above the plunger with the corresponding valve-seat of the upper head, and the diaphragms and spiders, being connected as hereinafter described, all may be lifted out, leaving the exterior portions of the pump-heads, and the connecting tubes in position.

In order to allow the parts to move smoothly, and particularly prevent the plunger cup-leathers from catching the inner portions of the pump-head, between the various beveled seats are enlarged tapering sides, as shown at GO, these tapering portions serving to guide the parts as they are removed or again inserted, and insuring their passing properly to their seats.

The diaphragm or partition 5 previously mentioned in the upper head is connected with the spider 7 below the chamber 4L by a sleeve G through which the plunger-red moves. This sleeve may be screw-threaded at the ends or otherwise constructed to unite the diaphragm and the spider. This spider serves as a seat for the valve 8. This valve is pressed upwardly by a spring 9, and normally closes the openings through the spider.

The water which passes into the chamber t on the downward stroke of the plunger 17 acts, by reason of the vacuum thus produced, to open the valve 8 against the pressure of the spring 9, and to allow the water to pass through, thence out through the ports 13, connecting with the ports A', C, and E', below the diaphragm 2. The water passing down through these ports again enters the interior and the pump cylinder through ports la, and the upper end 15 of the pump cylinder above the plunger, thus completing the suction and filling the upper part o-f the cylinder. The lower part of the pump cylinder 1G being already filled by the upstroke of the plunger, this water will be forced downwardly, and will pass out through the port 18, which leads into three ports G, and K, in the exterior of the pump head From these ports it passes through the ports 19, and enters the chamber 20. The lower part of this chamber is closed by a valve 21, closing on the seat in the spider 24, and maintained in closed position by a spring 22.

The upper portion of the chamber 2O is yformed by a partition or diaphragm 23 across the inside of the lower pump-head, and above the spider 24. These two parts 23 and 24C are connected by a sleeve 25, through which the plunger-rod is movable. The valve 21 closing on its seat, the water in the pump-cylinder is forced down through a spider 2G, and this opens a valve 27, which closes upwardly against the spider, and is normally maintained closed by a spring 28, and from the pressure and weight of the water from the discharge pipe. The downward stroke of the plunger being superior to this pressure opens the valve 27, and the water then enters the chamber 29. This chamber is formed by the spider 26 and the partition 23, the two being united by a sleeve 30 through which the plunger-rod passes. From the chamber 29 the water is forced through the ports 31, and passes through the alternate ports H, Jv and L, thence into the space 32 formed between the concentric tubes 33 and 34; thence upwardly and through ports 35 in the upper head. These ports lead into the ports B, D and F through which the water passes, thence through the ports 8G, and into the discharge pipe 3T. This completes the action of the pump on the down stroke.

When the vplunger 17 moves upwardly from the bottom of the pump within its cylinder 33, the suction draws the water through the lower spider 24e; overcoming the pressure upon the valve 21, the water enters the chamber 20. From this chamber the water passes through ports 19 which lead into the ports G, l and K, and passes thence through the ports 1S which lead into the pump cylinder below the plunger. This completes the suction on the up stroke.

The discharge of the water which has been drawn into the cylinder above the plunger 1T, and during its downward movement, is effected through the ports 14, and the ports A', C and E', thence through the ports 13, closing the valve S. The water in the cylinder then acts by passing through the spider 3S to open the valve 39, which is normally held closed by a spring 4:1, and the pressure within the discharge pipe. Water passing the valve 39 enters the chamber 40. This chamber is formed between the spider 3S and the solid partition or diaphragm 1l, and these two are connected by a sleeve Ll2 through which the plungerrod passes. From the chamber 40 the water passes through ports 13 which lead into the ports B, D and F, previously mentioned. The water passes through these ports, thence through the port 36, and into the discharge pipe 37, and to the surface. This completes the action of the pump on the up stroke.

The plunger-rod 49 has a packing-box 45, which screws down upon the upwardly extending portion of the partition 5, and a packing 4G is thus retained in place. This packing prevents the water from following the plunger-rod #19 through the diaphragm 5, and its connections.

Nuts 47 and 4S serve to clamp the plunger sections together. The nut 118 may be made suiiiciently long to allow the tail rod if) to screw into the nut. This tail rod passes through the diaphragm 23 and spiders 2t and 26, and has a nut 50 upon the lower end as previously described.

Vhen it is necessary to overhaul the plungerrods and cup leathers on the plunger, the pump rod is pulled up, and the plunger 17` brings the whole interior of the pump, that is to say the parts 38, 1l, 7, 5, andthe parts 24, 23, 26 to the surface. This includes all the valves and working parts, and leaves the pump cylinder and discharge pipe in position.

51 is a stuliing-box gland which clamps the packing 52 in place around the tail rod 49, and this keeps the water from following the rod through the members 23, 24 and 26.

Having thus described my invention, what I claim and desire to secure by Letters Pat ent is- 1. The combination in a pump, of upper and lower heads and an intermediate cylinder, said heads and cylinder being formed of concentric spaced cylinders and each of said heads having a plurality of exterior ports and an interior chamber, and a closed partition within said chamber, a valve for admitting` water through the head, and a plunger movable within the inner cylinder, the space between the cylinders forming a discharge passage from the lower head.

2. In a pump, the combination of a cylinder and a concentric head spaced therefrom to form a water passage, said head having a lateral opening, connecting with said space and having an interior chamber with which the opening connects, a horizontal partition between the cylinder and head said head having a water passage through it, and said head having a lateral opening below said partition connecting with the space between the head and cylinder, a valve controlling the water passage through the head, and a plunger below the valve and connecting with the space between the head and cylinder, said cylinder having a discharge passage.

3. Thecombination in a pump, the upper and lower heads and an intermediate connection, cylinders surrounding the heads and connection and forming a water passage therebetween, one of said cylinders having a horizontal partition with a central water passage and said heads having lateral openings above and below the partition connecting with the space between the heads and cylinders, other partitions extending transversely across the heads, and valves above and below said second partitions and controlling the passage of water through the lateral openings in the heads, and a piston operable in said intermediate connection.

et. The combination in a pump, of upper and lower valve containing heads and an intermediate connection with a plunger movable therein, said heads and connection being formed of concentric spaced cylinders with lateral openings therethrough, and said inner cylinder having a closed chamber connecting with said openings, closed partitions extending across the space between said cylinders, a valve controlling the discharge from said chamber and delivering water into the space at the other side ot' the partition, and a main discharge pipe with which the water passages communicate.

5. The combination in a pump of outer and inner concentric tubes, a plunger reciprocable in the inner tube, said plunger having a plurality of parallel spiders and oppositely turned cup leathers, heads formed of inner and outer cylinders and to which opposite ends of the tubes are secured, ports and channels formed in the heads and connecting with the annular space between the two, spring-pressed valves by which said ports are secured, and closed partitions extending across the space between the inner' and outer cylinders of an intermediate portion of the heads, said heads having an inner chamber connecting with said space,

-whereby reciprocation of the plunger produces alternate suction and ejection of water through each of the heads.

6. The combination in a pump of a head having a plurality of exterior ports and an interior chamber, closed partitions located within the inner chamber, seats with upwardly and downwardly opening valves, and. passages connecting the interior space with the alternate exterior ports, a plunger-rod extending through the partitions and spiders, and a plunger with which it is connected.

7. The combination in a pump of an upper head having a plurality of exterior ports, an interior chamber with partitions, valve seats and valves closable upon said seats, passages opening through the valve seats, and communicating respectively with one set of the exterior ports, and the other with the alternate ports, a discharge pipe leading from the upper end of the head, a pump cylinder, a plunger fitting therein, and a plunger-rod extending through the valves and partitions.

' 8. In a pump, a pump head having a series of ports within the outer shell, a partition or diaphragm fitting the upper part of the inner shell, a valve seat and a tubular connection between it and the diaphragm, a downwardly opening valve closable upon said seat, a second partition below said valve, a second valve seatA below said second partition having an upwardly opening valve, openings connecting the interior shell with alternate of the exterior ports, and other ports connecting the interior of the shell with the other of the exterior ports, a pump cylinder, a plunger fitting therein, and a pump rod extending upwardly through the valve seats and diaphragms.

9. In a pump, a pump head having a plurality of ports or channels within the exterior shell, an ,interior shell, alternate transverse diaphragms and valve seats closable in opposite directions upon said valve seats, tubes connecting the diaphragms and valve seats into a single structure, a plunger rod extending through said tubes, a pumping cylinder, a plunger movable within said cylinder having a nut upon the upper side, said nut contacting with the lower valve seat, whereby the connected diaphragms and valve seats may be removed in unison by lifting upon the plunger-rod.

10. In a pumping apparatus, a pump head including an exterior and interior shells, with a plurality of ports located between them, passages opening in said ports into the interior shell, transverse diaphragms and alternating valve seats, with upwardly and downwardly opening valves, said diaphragnis and valve seats having tapering peripheries, and corresponding tapering seats in the inner shell to receive and hold said parts in position.

ll. The combination in a pump, of a pumping cylinder, a plunger r-eciprocable therein, a pump head having exterior and interior shells with a plurality of intermediate ports, interspaced partitions and valve seats having tapering peripheries, corresponding tapering seats in the inner shell in which said partitions lit, spring-pressed valves opening in opposite directions, passages between the valve chambers and the exterior ports through which water may be transmitted, a discharge pipe and an inlet passage communicating with the upper ports, and a plunger rod guided and movable through the central portions of the diaphragms and valve seats, and through their connecting sleeves.

l2. The combination in a pump, of a pumping cylinder, a plunger itting therein having an upwardly extending pump rod, a pump head to which the upper end of the cylinder is connected, said head including an outer and an inner shell, with a plurality of ports between said shells, alternate partitions and valve seats with connecting tubes, the peripheries of said partitions and valve seats being tapered, correspondingly tapered surfaces within the inner shell which coact with the surfaces of the diaphragms and valve seats to retain them in position, enlargements of the inner shell between said seats, said enlargements having inclined surfaces to serve as guides in the removal and replacement of the plunger, the partitions and the valve seats.

13. The combination in a pump, of a pumping cylinder and exterior concentric shell, with a water passage between the two, an upper pump head including an outer and inner shell with which the pump cylinder and exterior tube are respectively connected, a plurality of independent ports between the outer and inner shells of the pump head, connected alternate partitions and valve seats removably fitting seats in the interior of the inner shell, and oppositely opening valves with passages connecting with the exterior ports, a second head connected with the lower end of the pump cylinder and the exterior tube respectively, said lower head having valve seats at opposite ends, an intermediate partition and oppositely opening valves With connecting sleeves, said valve seats and partition being removably fitted to the inner shell of the lower head, a plunger-rod extending centrally through said valve seats and partitions, and means carried by the plunger-rod to contact with the lowermost valve seats whereby they may all be lifted above the pump cylinder.

ln testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN Gr. DORVARD.

lVitnesses GEO. H. STRONG, E. Gr. BLAsDEL. 

